FFmpeg
eamad.c
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1 /*
2  * Electronic Arts Madcow Video Decoder
3  * Copyright (c) 2007-2009 Peter Ross
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Electronic Arts Madcow Video Decoder
25  * @author Peter Ross <pross@xvid.org>
26  *
27  * @see technical details at
28  * http://wiki.multimedia.cx/index.php?title=Electronic_Arts_MAD
29  */
30 
31 #include "libavutil/mem_internal.h"
32 
33 #include "avcodec.h"
34 #include "blockdsp.h"
35 #include "bytestream.h"
36 #include "bswapdsp.h"
37 #include "codec_internal.h"
38 #include "decode.h"
39 #include "get_bits.h"
40 #include "aandcttab.h"
41 #include "eaidct.h"
42 #include "mpeg12data.h"
43 #include "mpeg12vlc.h"
44 
45 #define EA_PREAMBLE_SIZE 8
46 #define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD I-frame */
47 #define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD P-frame */
48 #define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
49 
50 typedef struct MadContext {
57  unsigned int bitstream_buf_size;
58  DECLARE_ALIGNED(32, int16_t, block)[64];
59  uint16_t quant_matrix[64];
60  int mb_x;
61  int mb_y;
62 } MadContext;
63 
65 {
66  MadContext *s = avctx->priv_data;
67  s->avctx = avctx;
68  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
69  ff_blockdsp_init(&s->bdsp);
70  ff_bswapdsp_init(&s->bbdsp);
72 
73  s->last_frame = av_frame_alloc();
74  if (!s->last_frame)
75  return AVERROR(ENOMEM);
76 
77  return 0;
78 }
79 
80 static inline void comp(unsigned char *dst, ptrdiff_t dst_stride,
81  unsigned char *src, ptrdiff_t src_stride, int add)
82 {
83  int j, i;
84  for (j=0; j<8; j++)
85  for (i=0; i<8; i++)
86  dst[j*dst_stride + i] = av_clip_uint8(src[j*src_stride + i] + add);
87 }
88 
89 static inline void comp_block(MadContext *t, AVFrame *frame,
90  int mb_x, int mb_y,
91  int j, int mv_x, int mv_y, int add)
92 {
93  if (j < 4) {
94  unsigned offset = (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame->linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x;
95  if (offset >= (t->avctx->height - 7) * t->last_frame->linesize[0] - 7)
96  return;
97  comp(frame->data[0] + (mb_y*16 + ((j&2)<<2))*frame->linesize[0] + mb_x*16 + ((j&1)<<3),
98  frame->linesize[0],
99  t->last_frame->data[0] + offset,
100  t->last_frame->linesize[0], add);
101  } else if (!(t->avctx->flags & AV_CODEC_FLAG_GRAY)) {
102  int index = j - 3;
103  unsigned offset = (mb_y * 8 + (mv_y/2))*t->last_frame->linesize[index] + mb_x * 8 + (mv_x/2);
104  if (offset >= (t->avctx->height/2 - 7) * t->last_frame->linesize[index] - 7)
105  return;
106  comp(frame->data[index] + (mb_y*8)*frame->linesize[index] + mb_x * 8,
107  frame->linesize[index],
108  t->last_frame->data[index] + offset,
109  t->last_frame->linesize[index], add);
110  }
111 }
112 
113 static inline void idct_put(MadContext *t, AVFrame *frame, int16_t *block,
114  int mb_x, int mb_y, int j)
115 {
116  if (j < 4) {
118  frame->data[0] + (mb_y*16 + ((j&2)<<2))*frame->linesize[0] + mb_x*16 + ((j&1)<<3),
119  frame->linesize[0], block);
120  } else if (!(t->avctx->flags & AV_CODEC_FLAG_GRAY)) {
121  int index = j - 3;
123  frame->data[index] + (mb_y*8)*frame->linesize[index] + mb_x*8,
124  frame->linesize[index], block);
125  }
126 }
127 
128 static inline int decode_block_intra(MadContext *s, int16_t * block)
129 {
130  int level, i, j, run;
131  const uint8_t *scantable = ff_zigzag_direct;
132  int16_t *quant_matrix = s->quant_matrix;
133 
134  block[0] = (128 + get_sbits(&s->gb, 8)) * quant_matrix[0];
135 
136  /* The RL decoder is derived from mpeg1_decode_block_intra;
137  Escaped level and run values a decoded differently */
138  i = 0;
139  {
140  OPEN_READER(re, &s->gb);
141  /* now quantify & encode AC coefficients */
142  for (;;) {
143  UPDATE_CACHE(re, &s->gb);
145 
146  if (level == 127) {
147  break;
148  } else if (level != 0) {
149  i += run;
150  if (i > 63) {
151  av_log(s->avctx, AV_LOG_ERROR,
152  "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
153  return -1;
154  }
155  j = scantable[i];
156  level = (level*quant_matrix[j]) >> 4;
157  level = (level-1)|1;
158  level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
159  LAST_SKIP_BITS(re, &s->gb, 1);
160  } else {
161  /* escape */
162  UPDATE_CACHE(re, &s->gb);
163  level = SHOW_SBITS(re, &s->gb, 10); SKIP_BITS(re, &s->gb, 10);
164 
165  UPDATE_CACHE(re, &s->gb);
166  run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
167 
168  i += run;
169  if (i > 63) {
170  av_log(s->avctx, AV_LOG_ERROR,
171  "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
172  return -1;
173  }
174  j = scantable[i];
175  if (level < 0) {
176  level = -level;
177  level = (level*quant_matrix[j]) >> 4;
178  level = (level-1)|1;
179  level = -level;
180  } else {
181  level = (level*quant_matrix[j]) >> 4;
182  level = (level-1)|1;
183  }
184  }
185 
186  block[j] = level;
187  }
188  CLOSE_READER(re, &s->gb);
189  }
190  return 0;
191 }
192 
194 {
195  int value = 0;
196  if (get_bits1(gb)) {
197  if (get_bits1(gb))
198  value = -17;
199  value += get_bits(gb, 4) + 1;
200  }
201  return value;
202 }
203 
204 static int decode_mb(MadContext *s, AVFrame *frame, int inter)
205 {
206  int mv_map = 0;
207  int av_uninit(mv_x), av_uninit(mv_y);
208  int j;
209 
210  if (inter) {
211  int v = decode210(&s->gb);
212  if (v < 2) {
213  mv_map = v ? get_bits(&s->gb, 6) : 63;
214  mv_x = decode_motion(&s->gb);
215  mv_y = decode_motion(&s->gb);
216  }
217  }
218 
219  for (j=0; j<6; j++) {
220  if (mv_map & (1<<j)) { // mv_x and mv_y are guarded by mv_map
221  int add = 2*decode_motion(&s->gb);
222  if (s->last_frame->data[0])
223  comp_block(s, frame, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
224  } else {
225  s->bdsp.clear_block(s->block);
226  if(decode_block_intra(s, s->block) < 0)
227  return -1;
228  idct_put(s, frame, s->block, s->mb_x, s->mb_y, j);
229  }
230  }
231  return 0;
232 }
233 
234 static void calc_quant_matrix(MadContext *s, int qscale)
235 {
236  int i;
237 
238  s->quant_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0]) >> 11;
239  for (i=1; i<64; i++)
240  s->quant_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32) >> 10;
241 }
242 
244  int *got_frame, AVPacket *avpkt)
245 {
246  const uint8_t *buf = avpkt->data;
247  int buf_size = avpkt->size;
248  MadContext *s = avctx->priv_data;
249  GetByteContext gb;
250  int width, height;
251  int chunk_type;
252  int inter, ret;
253 
254  bytestream2_init(&gb, buf, buf_size);
255 
256  chunk_type = bytestream2_get_le32(&gb);
257  inter = (chunk_type == MADm_TAG || chunk_type == MADe_TAG);
258  bytestream2_skip(&gb, 10);
259 
260  av_reduce(&avctx->framerate.den, &avctx->framerate.num,
261  bytestream2_get_le16(&gb), 1000, 1<<30);
262 
263  width = bytestream2_get_le16(&gb);
264  height = bytestream2_get_le16(&gb);
265  bytestream2_skip(&gb, 1);
266  calc_quant_matrix(s, bytestream2_get_byte(&gb));
267  bytestream2_skip(&gb, 2);
268 
269  if (bytestream2_get_bytes_left(&gb) < 2) {
270  av_log(avctx, AV_LOG_ERROR, "Input data too small\n");
271  return AVERROR_INVALIDDATA;
272  }
273 
274  if (width < 16 || height < 16) {
275  av_log(avctx, AV_LOG_ERROR, "Dimensions too small\n");
276  return AVERROR_INVALIDDATA;
277  }
278 
279  if (avctx->width != width || avctx->height != height) {
280  av_frame_unref(s->last_frame);
281  if((width * (int64_t)height)/2048*7 > bytestream2_get_bytes_left(&gb))
282  return AVERROR_INVALIDDATA;
283  if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
284  return ret;
285  }
286 
287  if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
288  return ret;
289 
290  if (inter && !s->last_frame->data[0]) {
291  av_log(avctx, AV_LOG_WARNING, "Missing reference frame.\n");
292  ret = ff_get_buffer(avctx, s->last_frame, AV_GET_BUFFER_FLAG_REF);
293  if (ret < 0)
294  return ret;
295  memset(s->last_frame->data[0], 0, s->last_frame->height *
296  s->last_frame->linesize[0]);
297  memset(s->last_frame->data[1], 0x80, s->last_frame->height / 2 *
298  s->last_frame->linesize[1]);
299  memset(s->last_frame->data[2], 0x80, s->last_frame->height / 2 *
300  s->last_frame->linesize[2]);
301  }
302 
303  av_fast_padded_malloc(&s->bitstream_buf, &s->bitstream_buf_size,
305  if (!s->bitstream_buf)
306  return AVERROR(ENOMEM);
307  s->bbdsp.bswap16_buf(s->bitstream_buf, (const uint16_t *)(buf + bytestream2_tell(&gb)),
308  bytestream2_get_bytes_left(&gb) / 2);
309  memset((uint8_t*)s->bitstream_buf + bytestream2_get_bytes_left(&gb), 0, AV_INPUT_BUFFER_PADDING_SIZE);
310  init_get_bits(&s->gb, s->bitstream_buf, 8*(bytestream2_get_bytes_left(&gb)));
311 
312  for (s->mb_y=0; s->mb_y < (avctx->height+15)/16; s->mb_y++)
313  for (s->mb_x=0; s->mb_x < (avctx->width +15)/16; s->mb_x++)
314  if(decode_mb(s, frame, inter) < 0)
315  return AVERROR_INVALIDDATA;
316 
317  *got_frame = 1;
318 
319  if (chunk_type != MADe_TAG) {
320  av_frame_unref(s->last_frame);
321  if ((ret = av_frame_ref(s->last_frame, frame)) < 0)
322  return ret;
323  }
324 
325  return buf_size;
326 }
327 
329 {
330  MadContext *t = avctx->priv_data;
332  av_freep(&t->bitstream_buf);
333  return 0;
334 }
335 
337  .p.name = "eamad",
338  CODEC_LONG_NAME("Electronic Arts Madcow Video"),
339  .p.type = AVMEDIA_TYPE_VIDEO,
340  .p.id = AV_CODEC_ID_MAD,
341  .priv_data_size = sizeof(MadContext),
342  .init = decode_init,
343  .close = decode_end,
345  .p.capabilities = AV_CODEC_CAP_DR1,
346 };
bswapdsp.h
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
level
uint8_t level
Definition: svq3.c:204
blockdsp.h
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
mem_internal.h
comp
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:80
GetByteContext
Definition: bytestream.h:33
MadContext::bitstream_buf_size
unsigned int bitstream_buf_size
Definition: eamad.c:57
decode_mb
static int decode_mb(MadContext *s, AVFrame *frame, int inter)
Definition: eamad.c:204
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:116
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
AVPacket::data
uint8_t * data
Definition: packet.h:374
FFCodec
Definition: codec_internal.h:119
UPDATE_CACHE
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:178
BlockDSPContext
Definition: blockdsp.h:32
ff_set_dimensions
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:91
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:649
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:346
AV_CODEC_ID_MAD
@ AV_CODEC_ID_MAD
Definition: codec_id.h:181
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:1735
bytestream2_skip
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:123
MadContext::bdsp
BlockDSPContext bdsp
Definition: eamad.c:52
GetBitContext
Definition: get_bits.h:61
mpeg12vlc.h
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:478
ff_ea_idct_put_c
void ff_ea_idct_put_c(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
Definition: eaidct.c:80
av_reduce
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
AVRational::num
int num
Numerator.
Definition: rational.h:59
MadContext
Definition: eamad.c:50
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:104
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
CLOSE_READER
#define CLOSE_READER(name, gb)
Definition: get_bits.h:149
width
#define width
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:298
ff_blockdsp_init
av_cold void ff_blockdsp_init(BlockDSPContext *c)
Definition: blockdsp.c:58
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_GET_BUFFER_FLAG_REF
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:376
SHOW_SBITS
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:212
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:363
get_sbits
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:359
decode.h
get_bits.h
SKIP_BITS
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:193
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:264
ff_bswapdsp_init
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
run
uint8_t run
Definition: svq3.c:203
aandcttab.h
MadContext::avctx
AVCodecContext * avctx
Definition: eamad.c:51
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
ff_eamad_decoder
const FFCodec ff_eamad_decoder
Definition: eamad.c:336
LAST_SKIP_BITS
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:199
ff_mpeg1_rl_vlc
RL_VLC_ELEM ff_mpeg1_rl_vlc[680]
Definition: mpeg12.c:128
index
int index
Definition: gxfenc.c:89
bytestream2_get_bytes_left
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
bytestream2_tell
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:192
MADe_TAG
#define MADe_TAG
Definition: eamad.c:48
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1450
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AV_CODEC_FLAG_GRAY
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:259
AVPacket::size
int size
Definition: packet.h:375
calc_quant_matrix
static void calc_quant_matrix(MadContext *s, int qscale)
Definition: eamad.c:234
av_frame_ref
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:353
codec_internal.h
decode_end
static av_cold int decode_end(AVCodecContext *avctx)
Definition: eamad.c:328
MadContext::block
int16_t block[64]
Definition: eamad.c:58
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const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:31
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Definition: eamad.c:53
OPEN_READER
#define OPEN_READER(name, gb)
Definition: get_bits.h:138
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#define height
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:116
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
decode_block_intra
static int decode_block_intra(MadContext *s, int16_t *block)
Definition: eamad.c:128
MadContext::gb
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Definition: eamad.c:55
MadContext::bitstream_buf
void * bitstream_buf
Definition: eamad.c:56
ff_mpeg12_init_vlcs
av_cold void ff_mpeg12_init_vlcs(void)
Definition: mpeg12.c:164
av_fast_padded_malloc
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:49
value
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default value
Definition: writing_filters.txt:86
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:487
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:211
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int height
Definition: avcodec.h:571
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:608
avcodec.h
GET_RL_VLC
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Definition: get_bits.h:728
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const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
av_uninit
#define av_uninit(x)
Definition: attributes.h:154
ret
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Definition: filter_design.txt:187
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
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static av_cold int decode_init(AVCodecContext *avctx)
Definition: eamad.c:64
TEX_VLC_BITS
#define TEX_VLC_BITS
Definition: dvdec.c:146
ff_inv_aanscales
const uint16_t ff_inv_aanscales[64]
Definition: aandcttab.c:38
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
comp_block
static void comp_block(MadContext *t, AVFrame *frame, int mb_x, int mb_y, int j, int mv_x, int mv_y, int add)
Definition: eamad.c:89
mpeg12data.h
AVCodecContext
main external API structure.
Definition: avcodec.h:398
MadContext::last_frame
AVFrame * last_frame
Definition: eamad.c:54
MadContext::mb_y
int mb_y
Definition: eamad.c:61
SHOW_UBITS
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:211
AVRational::den
int den
Denominator.
Definition: rational.h:60
idct_put
static void idct_put(MadContext *t, AVFrame *frame, int16_t *block, int mb_x, int mb_y, int j)
Definition: eamad.c:113
MadContext::mb_x
int mb_x
Definition: eamad.c:60
MADm_TAG
#define MADm_TAG
Definition: eamad.c:47
decode210
static int decode210(GetBitContext *gb)
Definition: get_bits.h:831
av_clip_uint8
#define av_clip_uint8
Definition: common.h:101
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
add
static float add(float src0, float src1)
Definition: dnn_backend_native_layer_mathbinary.c:35
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:425
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
decode_frame
static int decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
Definition: eamad.c:243
decode_motion
static int decode_motion(GetBitContext *gb)
Definition: eamad.c:193
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:571
bytestream.h
eaidct.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:370
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
BswapDSPContext
Definition: bswapdsp.h:24
MadContext::quant_matrix
uint16_t quant_matrix[64]
Definition: eamad.c:59
re
float re
Definition: fft.c:79